Hi nmagu,
Our Top Up and Go Modems should come pre-loaded with £15 worth of credit already on them, and normally roaming is disabled to prevent it being used on a non Vodafone-UK network, so realistically this should not have happened.
While it is true that Vodafone Stores do not have a 7-day cooling off period anymore, I think you have a good case with this. I can see that your postcode puts you right on the border of Northern Ireland, so it's not difficult to see how the issue happened - it just really shouldn't have happened at all.
So that we can check your account and verify exactly what happened, I'll send an email to you know which will ask for all the details we will need. One of the team will then be in touch
Jon
eForum Team